Extremely buggy for me. I tried to play a trailer and it said that quicktime was required but was not supported for this version of iTunes. I then tried playing a preview of a song, when I tried to skip forward iTunes kept crashing. The betas were better than this version.

It’s advisable that you do update to iTunes 10.5 – especially if you plan to run iOS 5 when it’s released this coming Wednesday. It’s compulsory that iOS 5 users run this latest iTunes release, so if you want to be completely prepared, download and install iTunes 10.5.
Download link is available at :http://www.cellbull.com/download-itunes-10-5-for-windows-mac-final-version/

So is music purchased on iTunes only going to show up in the cloud? What about when I buy a CD and rip it to iTunes? Will those songs not go wirelessly to my iPhone? Will it still take a manual sync to get those songs on my iPhone?

Having issues with iTunes 10.5 and syncing and/or backing up my iPhone 4. The processes are extremely slw at first, then come to a stop. After an hour of "backing up", the bar has filled very little (almost NOTHING), and I've had to stop the process many times. Along with not being able to create a backup, the phone depicted in iTunes is either a 4S or running iOS 5, neither of which I have. I hope these issues get resolved quickly. Anyone else having sync/back up problems?

I am unable to use iTunes, everytime I try to use it I get this error 'iTunes was not installed correctly. Please reinstall iTunes.
Error 7 (Windows Error 5)'
Any help or suggestions would be appreciated. Thanks

I'm having the exact same issue. It's very annoying - especially when you have a lot of playlists. What could possibly be the reasoning behind this? Apple screwed up big time with this release. Steve Jobs' legacy of simplicity has gone flying out the door.